Kresnik on 14 December 2013
Clue for my #17 - a game from 2007 which was recently updated with a horde mode. Sold as part of a box set; as an individual download and is now free-to-play.
Clue for my #16 - final game in a sixth-gen trilogy. Contained levels that involved having shootouts in a castle in Scotland in the 1920's; battling zombies & ghosts in a haunted mansion in the 1990's and a train chase in the swinging 60's, against Blofeld... or thereabouts.
